Furnace.



J. R. FORTUNE.

FURNACE.

APPLICATION FILED DEC. 5. 1911.

Patented 0011631914 3 SHEETS SHBET l w m M H H 1 4 W I I m M w h m A e 5H .j l O a 2 m 1 P l I 4 3? U h A W T 7 W magi- 5 ww MW J. R. FORTUNE.

Patented Oct. 6, 1914.

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FURNACE.

APPLICATION FILED D130. 5.

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JOHN FORTUNE, 013 DETROIT, -MICHIGAN.

FURNACE.

Specification of Letters Patent.

Application filed December 5, 1911. Serial No. 664=,O66.

To all whom it may concern:

Be it known that 1, JOHN R. FoR'rUNii,--a citizen of the United Statesof America, ieshjling at Detroit, in the county of Wayne and State oillrlichigan, have invented certain new and useful Improvements inFurnaces, oi which the following is a specification, reference being hadtherein to the ac-. coinpanyiog drawings.

in the operation of automatic smoke 'conshining furnaces in which anarch plate is employed to support the arches over the lire chamber andthrough which arch plate air is supplied from the space betweeu thearches to combustion, it is found that the air which is admitted to theair space between the arche at their forward end. tends to flow instreams through the space instead of be ingeveuly distributed over theshrfaco of the arch to cool the same and further that the air isunevenly supplied to the fire chamber throughout the length of the archplate I for the reason that upon increased resist.

" ktlM'Q to the how of air through one portion of the arch plate l'uetothe banking of the fuel opposite that portion, the air will all Flowto other portions of the plate and enter theretlu'oug'b.

The object of this invention is to' provide means for causing an evendistribution or. the air over the surface of the inner arch to evenlycool the same and prevent unequal expansion and consequent breaking downof the arch, and further to so conduct the air to the arch plate thatthe air will be evenly supplied to the fire chamber throughout thelength 01 the arch.

To this end the invention consists in the matters hereinafter set forthand more particularly pointed out in the claims, references being had tothe accompanying draw rings. in whirh--- Figure 1 a front end elevationof a fur nace embodyingthe invention with portions broken away and insection to show the conslructiou; Fig. 2 is a perspective view of thesmue with portions broken away to show the mnistructiou: Fig. 3 is a perpective detail of portion of one of. the arch plates and m'ijaceutportion. of the arches supportml tln-u'cbyr, Fig. 4 is an enlargedtransverse rel-tics! section through an air inlet box; is a hmg iludinalvertical section through the same: and Fig. (5 is a perspective detailof the air hm; with its top and slice .Slum'n separated therefrom.

extrclue rear end otthe arch. comprises parallel side plates 12 builtinto In the 'clrawings, a furnace of the usual gcxieral construction isshown having a front plate '1, and side magazines 2 extending rearwardlytherefrom, the inner side of each magazine being formed by an arch plate3 for supporting an inner arch s and an outer arch 5 which arches springacross the fire chamber 6 from one to the other of the arch plates andare spaced apart to form transverse air passages 7 between thetransverse ribs or walls 8 which extend across the space between thearches and divide the same into a series of transverse air passages 7.Each of these air passages 7 communicates with the fire chamber throughthe arch plates which are each formed with passages 9 opening at theirlower ends below the inner arch and through openings 10 into saidpassages at-their up or ends.

A ii is admitted to the space between the arches atthe longitudinalcenter line of the outerarch by an air box 11 which is built into theouter arch 5 and extends longitudinally thereof from the front plate 1to the This air box the arch and spacedap'art by transverse partitio'ns13 which are detachably held in place by tic-belts 14. These bolts passthrough the plates 12, one at either side of each pr0- jection and thepartition is provided with :1. lug 15 extending laterally therefrom overone of the bolts tosupport the partition in place and when the nuts onthe outerends of the tie-bolts are turned up and the side plates drawntoward each other thereby the partitions are firmly clamped in place bysaid plates. These partitions are so located that each is positioneddirectly o er one of the transverse ribs or Walls Swvhich divide the airspace between the arches and thus air entering through the correspondingseries of openings 16 in a cover plate 17 secured upon the top of theair box, is directed into the severalpassages 7 and conducted laterallyin each directionirom .the air box to the arch. plates. The-to .plate 17is grooved at its under side to orm a way 18 for a slide or danilfiir 19adapted to be moved longitudinally of the air box. This slide is made upor'two parallel angle bars 20 connected by a series of plates 2'! whichare of a SllillClEnl. width to close the openings 16 when the slide ismoved longitudb nnlly. 'lhese plates 21 are spaced sachet distance apartthat the. openings between Patented 0ct. 6,1914l.

these holes in the cover plate will be fully opened leaving a freepassage for the air therethrough. The slide is moved by the operator bymeans of a handle bar 22 secured to its forward end and extendingthrough an opening in the front plate 1 of the furnace.

By dividing the space between the inner and outer arches into a seriesof transverse air passages and connecting theserair passages at thecenter of the outer arch with the atmosphere, air is conducted into thespace and evenly distributed over the surface of the inner arch toprevent unequal expansion thereof, and at the same time air is directedby these passages to the arch plates throughout their length so that airwill be evenly supplied to the fire chamber along the entire length ofeach arch plate. By providing the damper or slide to control the inletsof the several passages the amount of air can be accurately regulatedand the partial closing of the damper will control the flow of air tothe fire chamber through out the length of the arch plates as saiddamper controls all of the passages. In the ordinary construction wherethe air is admitted to the space between the arches and is permitted toflow to any part of the arch plate throughout its length, the regulationof the air is difficult as when the air is partially shut oif it willflow in the direction of the least resistance or where there is thegreatest draft, that is, to that part of the arch plate where the airpassages therethrough are free and open and toward the rear end of thearch plate where the draft is greatest.

Having thus fully described my invention what I claim is 1. In a furnaceconstructionninner and outer arches providin transverse air heatingpassages, and a longitudinal air inlet box forming the key of the outerarch and common to all of said passages intermediate the ends thereof.

2. In a furnace construction, an inner arch, an outer sectional arch,said arches providing transverse air heating passages, a longitudinalair inlet box forming the key ing open ends, an alr box mounted betweenthe sections of the outer arch and constituting a key therefor, andpartitions in said be providing air passages normally incoml'l'lUl'llCiLtlOIl with the series of air passages.

4:- In a furnace having a tire chamber, the combination with arch platesat the sides of the tire chamber formed with seats and air passages, ofarches over the fire chamber seated upon said seats and having a seriesof transverse air passages between them com- Inunicating with thepassages in the arch plates, a member in the outer arch at thelongitudinal center thereof forminr!- a series of inlets for the saidpassages between the arches, and a slide damper-for said member tocontrol the flow of air therethrough.

5. In a furnace having a fire chamber, the combination with arch platesat the side of the fire chamber formed with seats and air passages, ofan inner arch seated upon said seats, an outer arch seated upon saidseats with a space between it and the inner arch, transverse wallsbetween the arches d1- vidlng said space into a series of air passageshaving the ends thereof communicating with the passages in the archplates, an air box in the longitudinal center of the outer arch andhaving the bottom thereof in communication with the transverse airpassages and provided with transverse partitions above the transversewalls forming the air passages,atop on the boxhaving opein ings, and aslide damper on the box to close said openings.

In testimony whereof I ailix my signature in presence of two witnesses.

JOHN R. ronruun.

